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Water Year
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COLUMBIA - BONNEVILLE DAM
(
BONO3
)
Forecasts for Water Year
2026
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
76055
76356
80
77053
95202
APR-JUL
66754
66754
81
66754
82678
APR-AUG
72021
72110
80
72200
90174
JAN-SEP
101914
102215
87
102912
117770
JAN-JUL
92614
92614
88
92614
105246
OCT-SEP
122864
123164
92
123862
134527
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
76166
76414
80
76947
95202
APR-JUL
66754
66754
81
66754
82678
APR-AUG
72086
72181
80
72312
90174
JAN-SEP
102025
102273
87
102806
117770
JAN-JUL
92614
92614
88
92614
105246
OCT-SEP
122975
123222
92
123755
134527
Reference
ESP with 0 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
APR-SEP
76199
76499
80
77287
95202
APR-JUL
66754
66754
81
66754
82678
APR-AUG
72014
72132
80
72339
90174
JAN-SEP
102058
102358
87
103146
117770
JAN-JUL
92614
92614
88
92614
105246
OCT-SEP
123008
123308
92
124096
134527
Move the mouse over the desired "Forecast Period" to display a graph.
ESP10, 258, 324, 360, 415, 451, 70, , 74
ESP10, 252, 321, 356, 410, 450, 72, , 76
ESP10, 249, 322, 352, 410, 448, 74, , 78
ESP10, 248, 318, 355, 411, 447, 76, , 80
ESP10, 247, 319, 355, 410, 446, 78, , 82
ESP10, 244, 314, 352, 410, 444, 81, , 85
ESP10, 245, 316, 354, 415, 445, 83, , 87
ESP10, 247, 319, 357, 417, 447, 85, , 89
ESP10, 245, 321, 358, 418, 447, 87, , 91
ESP10, 241, 318, 353, 414, 444, 89, , 93
ESP10, 239, 319, 353, 409, 443, 91, , 95
ESP10, 240, 322, 355, 412, 445, 93, , 97
ESP10, 234, 322, 349, 412, 444, 95, , 99
ESP10, 235, 321, 351, 414, 447, 97, , 101
ESP10, 233, 320, 346, 411, 444, 99, , 103
ESP10, 218, 307, 333, 402, 433, 102, , 106
ESP10, 209, 300, 327, 394, 425, 104, , 108
ESP10, 219, 308, 336, 403, 433, 106, , 110
ESP10, 222, 311, 338, 405, 434, 108, , 112
ESP10, 224, 312, 344, 406, 436, 110, , 114
ESP10, 212, 303, 336, 395, 427, 112, , 116
ESP10, 212, 308, 341, 402, 428, 114, , 118
ESP10, 206, 309, 335, 398, 425, 116, , 120
ESP10, 215, 323, 345, 406, 435, 118, , 122
ESP10, 217, 329, 353, 419, 438, 120, , 124
ESP10, 218, 330, 352, 422, 440, 122, , 126
ESP10, 219, 330, 352, 423, 439, 125, , 129
ESP10, 231, 331, 357, 425, 439, 127, , 131
ESP10, 227, 326, 353, 419, 435, 129, , 133
ESP10, 209, 313, 340, 409, 426, 131, , 135
ESP10, 209, 312, 340, 408, 425, 133, , 137
ESP10, 215, 315, 344, 410, 429, 135, , 139
ESP10, 224, 317, 343, 407, 431, 137, , 141
ESP10, 233, 325, 353, 414, 440, 139, , 143
ESP10, 239, 327, 355, 416, 441, 141, , 145
ESP10, 239, 328, 356, 416, 439, 143, , 147
ESP10, 239, 327, 357, 414, 441, 145, , 149
ESP10, 235, 322, 350, 407, 434, 148, , 152
ESP10, 242, 327, 356, 412, 440, 150, , 154
ESP10, 244, 325, 358, 410, 443, 152, , 156
ESP10, 249, 332, 360, 410, 449, 154, , 158
ESP10, 253, 340, 362, 412, 452, 156, , 160
ESP10, 263, 347, 370, 416, 457, 158, , 162
ESP10, 272, 347, 375, 426, 464, 160, , 164
ESP10, 269, 340, 372, 424, 460, 162, , 166
ESP10, 276, 343, 376, 426, 466, 164, , 168
ESP10, 271, 337, 372, 423, 465, 166, , 170
ESP10, 284, 343, 378, 429, 471, 169, , 173
ESP10, 289, 342, 375, 424, 473, 171, , 175
ESP10, 290, 345, 376, 426, 474, 173, , 177
ESP10, 288, 346, 374, 424, 472, 175, , 179
ESP10, 283, 344, 371, 419, 469, 177, , 181
ESP10, 281, 347, 371, 417, 467, 179, , 183
ESP10, 292, 356, 384, 428, 474, 181, , 185
ESP10, 289, 355, 382, 429, 469, 183, , 187
ESP10, 289, 354, 383, 430, 469, 185, , 189
ESP10, 282, 347, 378, 426, 464, 187, , 191
ESP10, 280, 345, 379, 429, 463, 189, , 193
ESP10, 283, 345, 383, 431, 463, 192, , 196
ESP10, 271, 330, 374, 419, 452, 194, , 198
ESP10, 259, 316, 365, 408, 441, 196, , 200
ESP10, 264, 323, 371, 413, 448, 198, , 202
ESP10, 252, 317, 364, 402, 440, 200, , 204
ESP10, 233, 296, 343, 383, 423, 202, , 206
ESP10, 235, 300, 344, 390, 428, 204, , 208
ESP10, 227, 296, 339, 384, 422, 206, , 210
ESP10, 233, 303, 348, 396, 429, 208, , 212
ESP10, 229, 296, 341, 392, 423, 210, , 214
ESP10, 215, 275, 323, 374, 411, 212, , 216
ESP10, 208, 271, 317, 366, 404, 215, , 219
ESP10, 206, 269, 316, 367, 407, 217, , 221
ESP10, 210, 267, 318, 372, 412, 219, , 223
ESP10, 210, 268, 317, 372, 411, 221, , 225
ESP10, 207, 262, 311, 366, 409, 223, , 227
ESP10, 209, 262, 314, 365, 409, 225, , 229
ESP10, 212, 260, 313, 362, 408, 227, , 231
ESP10, 209, 261, 316, 360, 408, 229, , 233
ESP10, 216, 265, 319, 360, 409, 231, , 235
ESP10, 218, 273, 322, 358, 411, 233, , 237
ESP10, 222, 276, 316, 355, 409, 236, , 240
ESP10, 233, 279, 321, 362, 412, 238, , 242
ESP10, 243, 281, 325, 365, 410, 240, , 244
ESP10, 256, 284, 333, 375, 418, 242, , 246
ESP10, 259, 285, 337, 380, 420, 244, , 248
ESP10, 252, 274, 328, 374, 413, 246, , 250
ESP10, 246, 270, 324, 376, 413, 248, , 252
ESP10, 247, 277, 325, 379, 416, 250, , 254
ESP10, 249, 284, 334, 383, 423, 252, , 256
ESP10, 247, 284, 334, 379, 419, 254, , 258
ESP10, 254, 287, 332, 378, 420, 256, , 260
ESP10, 262, 290, 340, 376, 421, 259, , 263
ESP10, 261, 294, 337, 374, 420, 261, , 265
ESP10, 256, 288, 330, 370, 415, 263, , 267
ESP10, 254, 297, 331, 376, 413, 265, , 269
ESP10, 246, 292, 329, 372, 408, 267, , 271
ESP10, 244, 293, 328, 373, 405, 269, , 273
ESP10, 241, 292, 327, 374, 406, 271, , 275
ESP10, 241, 294, 328, 374, 405, 273, , 277
ESP10, 245, 291, 329, 373, 404, 275, , 279
ESP10, 250, 292, 332, 372, 403, 277, , 281
ESP10, 249, 294, 333, 372, 406, 279, , 283
ESP10, 249, 295, 332, 371, 408, 282, , 286
ESP10, 248, 296, 330, 370, 407, 284, , 288
ESP10, 252, 299, 327, 367, 409, 286, , 290
ESP10, 257, 298, 333, 368, 415, 288, , 292
ESP10, 255, 299, 334, 367, 413, 290, , 294
ESP10, 252, 297, 337, 365, 410, 292, , 296
ESP10, 257, 301, 340, 368, 411, 294, , 298
ESP10, 259, 307, 339, 370, 410, 296, , 300
ESP10, 264, 319, 345, 378, 415, 298, , 302
ESP10, 268, 321, 347, 378, 415, 300, , 304
ESP10, 276, 322, 352, 382, 420, 303, , 307
ESP10, 282, 326, 352, 383, 421, 305, , 309
ESP10, 289, 331, 359, 389, 426, 307, , 311
ESP10, 289, 332, 360, 389, 427, 309, , 313
ESP10, 285, 332, 356, 386, 423, 311, , 315
ESP10, 290, 334, 359, 388, 425, 313, , 317
ESP10, 294, 335, 361, 388, 429, 315, , 319
ESP10, 296, 344, 362, 388, 428, 317, , 321
ESP10, 296, 347, 365, 388, 428, 319, , 323
ESP10, 299, 343, 362, 389, 425, 321, , 325
ESP10, 296, 342, 358, 385, 420, 323, , 327
ESP10, 289, 337, 352, 381, 415, 326, , 330
ESP10, 294, 337, 354, 381, 420, 328, , 332
ESP10, 301, 339, 355, 382, 423, 330, , 334
ESP10, 302, 341, 356, 383, 422, 332, , 336
ESP10, 298, 337, 352, 380, 419, 334, , 338
ESP10, 304, 343, 357, 386, 423, 336, , 340
ESP10, 304, 340, 355, 386, 421, 338, , 342
ESP10, 304, 341, 357, 386, 419, 340, , 344
ESP10, 306, 342, 358, 385, 417, 342, , 346
ESP10, 310, 343, 358, 386, 417, 344, , 348
ESP10, 308, 340, 352, 380, 411, 346, , 350
ESP10, 314, 344, 355, 384, 413, 349, , 353
ESP10, 311, 346, 356, 385, 410, 351, , 355
ESP10, 303, 335, 347, 377, 401, 353, , 357
ESP10, 302, 334, 345, 377, 401, 355, , 359
ESP10, 306, 339, 352, 381, 406, 357, , 361
ESP10, 295, 325, 340, 368, 396, 359, , 363
ESP10, 307, 338, 352, 381, 409, 361, , 365
ESP10, 300, 331, 348, 371, 404, 363, , 367
ESP10, 307, 336, 356, 378, 410, 365, , 369
ESP10, 308, 336, 355, 381, 409, 367, , 371
ESP10, 314, 340, 358, 386, 414, 370, , 374
ESP10, 317, 339, 360, 387, 413, 372, , 376
ESP10, 322, 346, 361, 390, 415, 374, , 378
ESP10, 325, 346, 364, 391, 415, 376, , 380
ESP10, 319, 341, 361, 383, 407, 378, , 382
ESP10, 314, 334, 357, 378, 402, 380, , 384
ESP10, 305, 328, 350, 370, 393, 382, , 386
ESP10, 308, 334, 356, 372, 396, 384, , 388
ESP10, 304, 332, 355, 370, 393, 386, , 390
ESP10, 296, 323, 350, 364, 384, 388, , 392
ESP10, 288, 318, 345, 360, 377, 390, , 394
ESP10, 285, 316, 345, 359, 372, 393, , 397
ESP10, 281, 313, 340, 357, 372, 395, , 399
ESP10, 275, 306, 333, 349, 363, 397, , 401
ESP10, 278, 308, 333, 350, 364, 399, , 403
ESP10, 270, 299, 321, 336, 354, 401, , 405
ESP10, 284, 312, 335, 348, 367, 403, , 407
ESP10, 283, 311, 330, 345, 364, 405, , 409
ESP10, 276, 306, 324, 341, 358, 407, , 411
ESP10, 281, 310, 324, 345, 359, 409, , 413
ESP10, 285, 314, 330, 351, 366, 411, , 415
ESP10, 283, 312, 328, 349, 364, 413, , 417
ESP10, 280, 311, 326, 346, 360, 416, , 420
ESP10, 275, 306, 322, 342, 356, 418, , 422
ESP10, 277, 309, 326, 348, 359, 420, , 424
ESP10, 281, 309, 326, 348, 362, 422, , 426
ESP10, 285, 311, 332, 350, 364, 424, , 428
ESP10, 288, 310, 331, 349, 363, 426, , 430
ESP10, 296, 314, 334, 350, 367, 428, , 432
ESP10, 300, 313, 334, 348, 367, 430, , 434
ESP10, 289, 301, 324, 337, 358, 432, , 436
ESP10, 284, 299, 319, 332, 352, 434, , 438
ESP10, 288, 305, 322, 339, 356, 437, , 441
ESP10, 284, 301, 321, 338, 353, 439, , 443
ESP10, 285, 303, 326, 344, 354, 441, , 445
ESP10, 287, 308, 332, 348, 361, 443, , 447
ESP10, 289, 311, 333, 351, 365, 445, , 449
ESP10, 296, 317, 342, 357, 370, 447, , 451
ESP10, 299, 318, 344, 358, 371, 449, , 453
ESP10, 297, 317, 342, 353, 370, 451, , 455
ESP10, 302, 326, 347, 360, 375, 453, , 457
ESP10, 300, 325, 347, 362, 374, 455, , 459
ESP10, 297, 323, 347, 363, 373, 457, , 461
ESP10, 301, 324, 347, 365, 373, 460, , 464
ESP10, 303, 330, 352, 369, 375, 462, , 466
ESP10, 302, 324, 349, 364, 370, 464, , 468
ESP10, 297, 319, 343, 356, 363, 466, , 470
ESP10, 294, 318, 340, 353, 360, 468, , 472
ESP10, 295, 318, 339, 352, 360, 470, , 474
ESP10, 294, 319, 339, 354, 361, 472, , 476
ESP10, 298, 321, 342, 356, 364, 474, , 478
ESP10, 296, 322, 339, 353, 359, 476, , 480
ESP10, 308, 331, 348, 361, 367, 478, , 482
ESP10, 305, 327, 346, 359, 365, 480, , 484
ESP10, 313, 334, 350, 362, 369, 483, , 487
ESP10, 316, 330, 348, 359, 367, 485, , 489
ESP10, 315, 330, 348, 359, 367, 487, , 491
ESP10, 319, 334, 349, 363, 369, 489, , 493
ESP10, 321, 336, 353, 365, 371, 491, , 495
ESP10, 321, 340, 356, 367, 373, 493, , 497
ESP10, 330, 350, 366, 375, 385, 495, , 499
ESP10, 329, 349, 364, 374, 384, 497, , 501
ESP10, 330, 351, 365, 375, 385, 499, , 503
ESP10, 329, 351, 364, 373, 384, 501, , 505
ESP10, 327, 351, 364, 372, 384, 504, , 508
ESP10, 330, 354, 366, 374, 386, 506, , 510
ESP10, 331, 354, 365, 373, 385, 508, , 512
ESP10, 332, 355, 367, 376, 385, 510, , 514
ESP10, 339, 358, 371, 380, 390, 512, , 516
ESP10, 341, 363, 373, 382, 395, 514, , 518
ESP10, 342, 364, 376, 384, 394, 516, , 520
ESP10, 343, 364, 376, 385, 394, 518, , 522
ESP10, 343, 363, 375, 384, 392, 520, , 524
ESP10, 344, 364, 375, 385, 392, 522, , 526
ESP10, 344, 363, 376, 386, 391, 524, , 528
ESP10, 343, 361, 375, 387, 392, 527, , 531
ESP10, 345, 365, 373, 387, 393, 529, , 533
ESP10, 348, 367, 374, 388, 393, 531, , 535
ESP10, 348, 366, 373, 387, 390, 533, , 537
ESP10, 350, 366, 374, 386, 390, 535, , 539
ESP10, 352, 366, 377, 387, 393, 537, , 541
ESP10, 350, 363, 376, 385, 391, 539, , 543
ESP10, 354, 363, 377, 386, 393, 541, , 545
ESP10, 354, 361, 376, 385, 392, 543, , 547
ESP10, 357, 363, 380, 386, 393, 545, , 549
ESP10, 359, 366, 381, 388, 394, 547, , 551
ESP10, 362, 372, 385, 392, 397, 550, , 554
ESP10, 359, 369, 381, 389, 394, 552, , 556
ESP10, 358, 368, 379, 387, 391, 554, , 558
ESP10, 360, 372, 380, 386, 391, 556, , 560
ESP10, 358, 371, 379, 384, 389, 558, , 562
ESP10, 358, 370, 380, 385, 389, 560, , 564
ESP10, 357, 368, 378, 381, 388, 562, , 566
ESP10, 358, 367, 376, 381, 387, 564, , 568
ESP10, 358, 370, 377, 382, 387, 566, , 570
ESP10, 362, 371, 378, 384, 389, 568, , 572
ESP10, 358, 366, 374, 379, 386, 571, , 575
ESP10, 362, 368, 377, 382, 388, 573, , 577
ESP10, 361, 368, 377, 383, 388, 575, , 579
ESP10, 363, 370, 378, 383, 389, 577, , 581
ESP10, 366, 371, 379, 386, 391, 579, , 583
ESP10, 366, 371, 378, 386, 391, 581, , 585
ESP10, 366, 371, 379, 386, 390, 583, , 587
ESP10, 370, 376, 381, 389, 393, 585, , 589
ESP10, 373, 379, 383, 391, 395, 587, , 591
ESP10, 374, 381, 386, 393, 397, 589, , 593
ESP10, 373, 380, 384, 391, 395, 591, , 595
ESP10, 379, 387, 391, 397, 401, 594, , 598
ESP10, 378, 387, 393, 398, 400, 596, , 600
ESP10, 383, 390, 396, 402, 404, 598, , 602
ESP10, 384, 389, 396, 400, 402, 600, , 604
ESP10, 384, 389, 395, 400, 403, 602, , 606
ESP10, 386, 391, 397, 402, 405, 604, , 608
ESP10, 387, 392, 397, 403, 405, 606, , 610
ESP10, 386, 392, 397, 401, 404, 608, , 612
ESP10, 386, 392, 397, 401, 404, 610, , 614
ESP10, 387, 394, 399, 403, 406, 612, , 616
ESP10, 388, 395, 400, 405, 406, 614, , 618
ESP10, 387, 395, 400, 404, 406, 617, , 621
ESP10, 388, 397, 400, 404, 407, 619, , 623
ESP10, 385, 393, 398, 402, 406, 621, , 625
ESP10, 393, 399, 403, 408, 411, 623, , 627
ESP10, 393, 399, 403, 407, 410, 625, , 629
ESP10, 393, 399, 403, 407, 411, 627, , 631
ESP10, 390, 395, 400, 404, 407, 629, , 633
ESP10, 390, 396, 401, 403, 407, 631, , 635
ESP10, 388, 394, 399, 400, 404, 633, , 637
ESP10, 390, 396, 401, 404, 407, 635, , 639
ESP10, 392, 398, 403, 405, 408, 638, , 642
ESP10, 392, 396, 402, 404, 407, 640, , 644
ESP10, 393, 396, 402, 405, 407, 642, , 646
ESP10, 393, 396, 402, 405, 406, 644, , 648
ESP10, 395, 398, 404, 406, 408, 646, , 650
ESP10, 399, 402, 406, 409, 410, 648, , 652
ESP10, 400, 402, 406, 409, 410, 650, , 654
ESP10, 400, 402, 406, 409, 410, 652, , 656
ESP10, 400, 403, 407, 409, 410, 654, , 658
ESP10, 400, 404, 407, 410, 410, 656, , 660
ESP10, 400, 405, 407, 410, 410, 658, , 662
ESP10, 400, 405, 407, 410, 410, 661, , 665
ESP10, 400, 404, 406, 409, 409, 663, , 667
ESP10, 399, 404, 406, 408, 409, 665, , 669
ESP10, 401, 406, 407, 410, 410, 667, , 671
ESP10, 400, 406, 407, 409, 410, 669, , 673
ESP10, 400, 405, 407, 409, 410, 671, , 675
ESP10, 401, 406, 408, 409, 410, 673, , 677
ESP10, 401, 406, 408, 410, 411, 675, , 679
ESP10, 401, 406, 408, 410, 411, 677, , 681
ESP10, 401, 406, 408, 409, 411, 679, , 683
ESP10, 401, 406, 408, 409, 410, 681, , 685
ESP10, 401, 406, 408, 409, 411, 684, , 688
ESP10, 402, 406, 408, 409, 411, 686, , 690
ESP10, 402, 406, 408, 410, 411, 688, , 692
ESP10, 403, 406, 409, 410, 411, 690, , 694
ESP10, 404, 407, 409, 411, 412, 692, , 696
ESP10, 404, 408, 409, 411, 412, 694, , 698
ESP10, 405, 409, 410, 412, 413, 696, , 700
ESP10, 405, 409, 410, 411, 412, 698, , 702
ESP10, 405, 409, 410, 411, 412, 700, , 704
ESP10, 406, 409, 410, 412, 413, 702, , 706
ESP10, 406, 409, 411, 412, 413, 705, , 709
ESP10, 407, 409, 411, 412, 413, 707, , 711
ESP10, 408, 410, 412, 413, 413, 709, , 713
ESP10, 407, 410, 411, 412, 413, 711, , 715
ESP10, 408, 410, 412, 412, 413, 713, , 717
ESP10, 408, 410, 411, 412, 413, 715, , 719
ESP10, 408, 411, 412, 413, 413, 717, , 721
ESP10, 407, 410, 411, 412, 413, 719, , 723
ESP10, 407, 410, 411, 412, 413, 721, , 725
ESP10, 407, 410, 412, 413, 413, 723, , 727
ESP10, 408, 410, 412, 412, 413, 725, , 729
ESP10, 409, 411, 412, 413, 414, 728, , 732
ESP10, 411, 413, 414, 414, 415, 730, , 734
ESP10, 410, 412, 413, 414, 415, 732, , 736
ESP10, 410, 412, 413, 414, 415, 734, , 738
Max Scale
Scale To Data
Scale To Last 45 Days
Show Min/Max Ensemble Volume
Show Tooltips Help
Overlay
ESP10
HEFS
ESP0
Data Files
/chpsesp/ensemble/watersupply/BONO3W_SQIN.ESPF10.csv
BONO3W_SQIN.ESPF0.csv|2026-08-15
BONO3W_SQIN.ESPF10.csv|2026-08-15
BONO3W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
COLUMBIA - BONNEVILLE DAM
(
BONO3
)
Forecasts for Water Year
2027
Official Water Supply
ESP with 10 Days QPF
Ensemble:
2026-08-15
Issued:
2026-08-15
Hide Forecast
Forecast
Period
Forecasts Are in KAF
30 Year
Average
(1991-2020)
90 %
50 %
%
Average
10 %
APR-SEP
66993
89125
94
112534
95202
APR-JUL
56965
75940
92
96188
82678
APR-AUG
62832
83594
93
106261
90174
JAN-SEP
82915
107744
91
135004
117770
JAN-JUL
72800
94450
90
120265
105246
OCT-SEP
95889
121364
90
154215
134527
Move the mouse over the desired "Forecast Period" to display a graph.
Max Scale
Scale To Data
Scale To Last 45 Days
Show Min/Max Ensemble Volume
Show Tooltips Help
Overlay
ESP10
Data Files
/chpsesp/ensemble/watersupply/BONO3W_SQIN.ESPF10.csv
BONO3W_SQIN.ESPF0.csv|2026-08-15
BONO3W_SQIN.ESPF10.csv|2026-08-15
BONO3W_SQIN.ESPFM.csv|2026-08-15
APR-SEP
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ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast
